Which order shows the levels of organization from smallest to largest? O cell
organ
tissue
organ system
organism
O cell
O cell
tissue
organ - organ system organism
organ system organ tissue - organism
organ organ system tissue – organism
cell
Ok

The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from a. an increase in cellular respiration b. increased decomposition by bacteria c. an increase in the burning of fossil fuels d. an increase in photosynthesis

Which type of transport is responsible for oxygen entering into blood cells? a. vesicle b.passive c. facilitated d.active b.passive

What factors contribute to the effect an environmental toxin has on the human body?